Belief, Disbelief and Deviation
The lowest grade of belief: Amir’ul-Mu’minin ‘Ali Ibn Abi Talib (a.s.) states,
"The bare minimum by which a person becomes a believer is that when Allah introduces Himself, he should submit himself completely and absolutely before His commands. And when He grants him the recognition of His Prophet (S), he must obey him (S). And when He introduces His Proof and His Witness on His earth to him, he should acknowledge him and obey him (a.s.)."
On this Sulaym asked Amir’ul-Mu’minin (a.s.), "Even if he remains unaware of other realities?"
He (a.s.) replied, "Yes. This will apply till he continues to obey what has been made obligatory on him and refrains from what has been prohibited."
The lowest grade of disbelief: In the same tradition, Amir’ul-Mu’minin (a.s.) proceeds to explain the minimum thing that makes a person an unbeliever.
"The minimum that makes a person an unbeliever is that he considers Allah's command as prohibition and that Allah has determined for him a religion which he is following, and he thinks that he is worshipping as per the dictates of Allah, although the fact is that he is venerating the Devil."
The lowest grade of deviation
"And the minimum level of deviation is that man does not recognize Allah's proof, His witness upon the creatures, whose obedience has been ordered by Allah and whose leadership and mastership is compulsory."
Please Note
Man is either a believer or an unbeliever or deviated. In this tradition, Amir’ul-Mu’minin (a.s.) has provided the standards for all three. Belief is that man recognizes Allah, the Messenger of Allah (S) and the Imam of his time. Along with this recognition, he also worships Allah and obeys His Messenger and the Imam.
Disbelief is that man denies all that has been revealed or acknowledges that which Allah has not revealed. He accepts them as his Prophet and Imam whom Allah has not appointed. Deviation is that he denies the Imamat and mastership of those whom Allah has deemed to be His Proofs on the earth and made them as His Witnesses on the people.
To believe in the Messenger of Allah (S) and his recognition implies that we recognize him (S) as Allah has introduced him (S). Moreover, we should believe that he (S) enjoys all those positions and stations that Allah has determined for him (S). It is evident and everybody is aware of the fact that the Messenger of Allah (S) is the chief of all messengers and prophets (a.s.). He is the last of all His messengers and prophets (a.s.). Messengership and Prophethood have ended with him (S).
Now, till the Day of Judgment, no messenger or prophet will arrive. His shariah is the last heavenly shariah and his book, the Holy Quran, is the last divine and heavenly book. Islam is the last and most perfect of all religions. Things that have been made permissible by it shall remain so till the Day of Judgment and articles that have been prohibited by it shall remain so till the Day of Judgment.
To believe in Allah's Proofs connotes that we believe only in the leadership, mastership and caliphate of those appointed by Allah; whose following is the guarantee for salvation, and whose love and obedience are deemed to be the keys of paradise. The Messenger of Allah (S) has fixed their number to be twelve and prophesied,
"After me, till the Day of Judgment, the number of my successors will be twelve. All of them will be from Quraish. The first of them will be ‘Ali Ibn Abi Talib (a.s.) and the last and twelfth will be the son of Hasan al-Askari (a.s.), the Hujjah, the Mahdi. Allah will grant him a long life and keep him in occultation. During his concealment, people will benefit from his existence like they draw advantage from the sun when it hides behind the clouds."
Our Prophet is the Last Prophet
From the above, we can easily deduce that the Messenger of Allah (S) is the seal of all of His Messengers and Prophets (a.s.), Imam Mahdi (a.t.f.s.) is the last Imam, the Majestic Quran is the last book and Islam is the last religion.
But from times ancient, anti-Islamic forces, imperialist powers and Zionist conspirators have tried their best to create obstacles in these universally accepted and firmer than mountain beliefs of the Muslims, and to deviate them from the right path. Therefore, there were a few from the community, willing to sell their conscience and negligent of realities, who claimed the elevated station of Mahdawiyyah.
Worse are their followers, who throw their leaders into further depths by becoming their ardent fans, to the extent that they (the claimants) seriously start considering themselves as a Prophet or an Imam. Meanwhile, the Holy Quran has declared in no uncertain terms,
"And who is more unjust than he who forges a lie against Allah, or says; it has been revealed to me; while nothing has been revealed to him, and he who says: I can reveal the like of what Allah has revealed and if you had seen when the agonies of death and the angels shall spread forth their hands: Give up your souls: today shall you be recompensed wit h an ignominious chastisement because you spoke against Allah other than the truth and (because) you showed pride against His communications. " (Surah An'aam, 6:93)
Similarly, in another verse, it warns,
"…who, then is more unjust than he who forges a lie against Allah that he should lead astray men without knowledge? Surely Allah does not guide the unjust people." (Surah An'aam, 6:144)